T. William Lambe, late professor of MIT, advocated that pore water pressure is a cornerstone of soil mechanics and has historically been used in virtually all analyses of geotechnical and geoenvironmental engineering problems. But is the conventional concept adequate? Researchers Ning Lu, F.ASCE; William J. Likos, M.ASCE; Shengmin Luo, A.M.ASCE; and Hyunjun Oh, A.M.ASCE, contend that practical problems have emerged over the past century that challenge the adequacy of the conventional pore water pressure concept.

Their forum paper published in the Journal of Geotechnical and Geoenvironmental Engineering, entitled “Is the Conventional Pore Water Pressure Concept Adequate for Fine-Grained Soils in Geotechnical and Geoenvironmental Engineering?” offers a new equation for soil water pressure under all saturation conditions.

They posit that a more general definition of pore water pressure will aid geotechnical and geoenvironmental engineers in developing better solutions. Learn more about their research in the abstract below or by reading the full paper in the ASCE Library: https://doi.org/10.1061/(ASCE)GT.1943-5606.0002612

Abstract

Forum papers are thought-provoking opinion pieces or essays founded in fact, sometimes containing speculation, on a civil engineering topic of general interest and relevance to the readership of the journal. The views expressed in this Forum article do not necessarily reflect the views of ASCE or the Editorial Board of the journal.

Pore water pressure quantified as the product of the unit weight of water and piezometric or tensiometric pressure head has historically been used in virtually all analyses of geotechnical and geoenvironmental engineering problems. Is the conventional pore water pressure concept adequate? The authors contend that it is not and offer a general and adequate equation for soil pore water pressure under all saturation conditions.

Read the full paper in the ASCE Library: https://doi.org/10.1061/(ASCE)GT.1943-5606.0002612